Submission #372757

#	Time	Username	Problem	Language	Result	Execution time	Memory
372757		Drew_	Traffic (IOI10_traffic)	C++14	Compilation error	0 ms	0 KiB

traffic

#include <traffic.h>
#include <iostream>
#include <vector>
#include <functional>
using namespace std;

#define pb push_back

int LocateCentre(int N, int P[], int S[], int D[])
{
	vector<vector<int>> adj(N);
	for (int i = 0; i < N-1; ++i)
		adj[S[i]].pb(D[i]), adj[D[i]].pb(S[i]);

	vector<int> sz(N, 0);
	vector<bool> vst(N, false);

	function<int(int)> dfs = [&](int node)
	{
		vst[node] = true;
		sz[node] = P[node];
		for (int to : adj[node])
		{
			if (!vst[to])
				sz[node] += sz[to];
		}
		return sz[node];
	};
	dfs(0);

	int res = 2e9 + 7;
	for (int node = 0; node < N; ++node)
	{
		int tmp = 0;
		for (int to : adj[node])
		{
			int ctr = sz[to];
			if (sz[to] > sz[node])
				ctr = sz[0] - sz[node];
			tmp = max(tmp, ctr);
		}
		res = min(res, tmp);
	}
	return res;
}

int main()
{
	int N;
	cin >> N;

	int A[N], S[N-1], D[N-1];
	for (int i = 0; i < N; ++i)
		cin >> A[i];
	for (int i = 0; i < N-1; ++i)
		cin >> S[i] >> D[i];
	cout << LocateCentre(N, A, S, D) << '\n';

	return 0;
}

Compilation message (stderr)

/tmp/cclRawYl.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccVRbpxh.o:traffic.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status